2021年2017-2018年广州市荔湾区八上期末考试数学试卷和答案.pdf

本文为 word 版资料，可以任意编辑修改2017-2018学年荔湾区初二级期末考数学科试卷一、选择题（本题共有10 小题，每小题 2 分，共 20 分）1、在角、等边三角形、平行四边形、梯形中是轴对称图形的是（）A、B、C、D、2、计算 4x2?x3的结果是（）A、4x6B、4x5C、4x4D、4x33、若 x、y 的值均扩大为原来的2 倍，则下列分式的值保持不变的是（）A、错误!未找到引用源。B、错误!未找到引用源。C、错误!未找到引用源。D、错误!未找到引用源。4、下列计算中，正确的是（）A、2a3a3=6 B、(a-b)2=a2-b2C、2a3a3=a3D、(-ab)2=a2b25、长度分别为7,2，x 的三条线段能组成一个三角形，x 的值可以是（）A、4 B、5 C、6 D、9 6、内角和等于外角和的多边形是（）A、三角形B、四边形C、五边形D、六边形7、如图，点P 是 AOB 平分线 OC 上一点，PDOB，垂足为D，若 PD3，则点 P 到边 OA 的距离是（）A、错误!未找到引用源。B、2 C、3 D、4 8、如图，ABCAOC BOD，点 A 与点 B 事对应点，那么下列结论中错误的是（）A、AB=CD B、AC=BD C、AO=BO D、A=B 9、如图，（在 ABC 中，B=30，BC 的垂直平分线交AB 于 E，垂足为D，如果 DE=5，则 EC 的长为（）A、5 B、8 C、9 D、10 10、如图，AD 是 ABC 的中线，E、F 分别是 AD 和 AD 延长线上的点，且DE=DF，连接 BF、CE，下列说法：ABD 和 ACD 面积相等；BAD=CAD；BDF CDE；BFCE；CE=AE，其中正确的有（）A、B、C、D、|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 8 页|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 8 页二、填空题（本题共有6 小题，每小题 3 分，共 18 分）11、计算：40+2-1=。12、使分式 错误!未找到引用源。有意义的x 的取值范围是。13、要使 x2-2ax+16 是完全平方式，那么a 的值是。14、若一个等腰三角形的周长为26，一边长为6，则它的腰长为。15、如图，在锐角ABC 中，CD、BE 分别是 AB、AC 边上的高，且CD、BE 相交于点P，若 A=70，则 BPC=。16、如图，在锐角ABC 中，AC=6，ABC 的面积为15，BAC 的平分线交BC 于点 D、M、N 分别是 AD 和 AB 上的动点，则BM+MN的最小值是。三、解答题（本小题共有7 小题，共 62 分）17、（每小题4 分，本题满分8 分）计算：（x+2）（2x-1）（-2x3）2-3x2（x4-y2）18、（每小题4 分，本题满分8 分）分解因式：2a2-8（x-1）2-2（x-1）-3|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 8 页|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 8 页文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S119、（每小题4 分，本题满分8 分）计算：错误!未找到引用源。错误!未找到引用源。20、（本题满分8 分）如图，平面直角坐标系中，ABC 的三个顶点坐标分别为A(1，3)，B(3，3)，C(4，-1)。画出 ABC 关于 x 轴对称的 A1B1C1，写出点A1、B1、C1的坐标；求 A1B1C1的面积。21、（本题满分10 分）如图，AE DB，CFDB，垂足分别是点E、F，DE=BF、AE=CF，求证：A=C|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 8 页|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 8 页文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S122、（本题满分10 分）列方程解应用题：某美术社团为练习素描需要购买素描本，第一次用600 元购买了若干本素描本，用完后再花了1200 元继续在同一家商店购买同样的素描本，但这次的单价是第一次单价的1.2 倍，购买的数量比第一次多了40 本。求第一次购买的素描本单价是多少元？23、（本题满分10 分）如图，在等腰Rt ABC 中，ACB=90，P 是线段 BC 上一动点（与点B、C 不重合），连接 AP 延长 BC 至点 Q，使 CQ=CP，过点 Q 作 QHAP 于点 H，交 AB 于点 M。若 APC=a，求 AMQ 的大小（用含a 的式子表示）；在 的条件下，过点M 作 MEQB 于点 E，试说明PC 与 ME 之间的数量关系，并证明。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 8 页|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 8 页文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S12017-2018学年荔湾区初二级期末考数学科试卷参考答案一、选择题题号1 2 3 4 5 6 7 8 9 10 答案A B D D C B C A D C 二、填空题11、错误!未找到引用源。12、x-3 13、414、10 15、11016、5三、解答题17、（8 分）解：原式=2x2-x+4x-2=2x2+3x-2 解：原式=4x6-3x6+3x2y2=x6+3x2y218、（8 分）解：原式=2（a2-4）=2（a+2）（a-2）解：原式=（x-1-3）（x-1+1）=x（x-4）19、（8 分）解：原式=错误!未找到引用源。|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 5 页，共 8 页|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 5 页，共 8 页文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1=错误!未找到引用源。解：原式=错误!未找到引用源。?错误!未找到引用源。=错误!未找到引用源。?错误!未找到引用源。=错误!未找到引用源。?错误!未找到引用源。=错误!未找到引用源。20、（8 分）解：如图所示，A1B1C1即为所求。A1(1，-3)，B1(3，-3)，C1(4，1)A1B1C1的面积=34-错误!未找到引用源。14-错误!未找到引用源。34=4 21、（10 分）证明：DE=BF DE+EF=BF+EF 即 DF=BE AEDB，CFDB AEB=CFD=90在 AEB 和 CFD 中AE=CF AEB=CFD BE=DF AEB CFD（SAS）A=C|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 6 页，共 8 页|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 6 页，共 8 页文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S122、（10 分）解：设第一次购买的素描本单价为x 元，则第二次的单价为1.2x 元。错误!未找到引用源。=错误!未找到引用源。-40 错误!未找到引用源。1.2x=错误!未找到引用源。1.2x-40 1.2x720=1200-48x x=10 经检验：x=10 是方程的解答：第一次购买的素描本单价为10 元。23、（10 分）解：QHAP QHP=90在 QHP 中，APC=a HQP-90-a ACB 为等腰直角三角形 B=45 AMQ 为 QMB 的外角 AMQ=B+MQB=45+90-a=135-a PC=ME 证明：连接AQ AC PQ 且 QC=CP AQ=AP AQP=APQ=a 在 AQB 中，QAB=180-AQB-B=180-a-45=135-a 由 可得 AMQ=QAB AQ=MQ|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 7 页，共 8 页|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 7 页，共 8 页文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1A10N10 ZP8V4G8O5S1文档编码:CB9Z7A2D2P4 HC5Y5C1